Boom chain and plug



(No Model.)

T. IRVINE.

BOOM CHAIN AND PLUG. No. 268,681. Patented Dec. 5; 1882;.

WITNESSES fiwm INVENTOR N. PETERS. mw-um u mr, Washington. D, c.

UNITED STATES PATENT OFFICE.

THOMAS IRVINE, OF BEEF SLOUGH, WISCONSIN.

BOOM CHAIN AND PLUG.

SPECIFICATION formingpart of Letters Patent No. 268,681, dated December5, 1882.

Application filed July 22, 1882. (No model.)

To all whom it may concern:

Be it known that I, THOMAS IRVINE, a citizen of the United States,resident at Beef Slough, in the county of Buffalo and State ofWisconsin, have invented a new and valuable Improvement in Boom Chainsand Plugs; and I do hereby declare that the following is a full, clear,and exact description of the construction and operation of the same,reference beinghad to the annexed drawings, making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawings is a representation of this invention inperspective, showing the two plugs and the chain. Fig. 2 is a plan view,showing the ends of two legs with the chain and plugs attached. Fig. 3is a perspective view of the same. Fig. 4 is a side View of one of theplugs. Fig. 5 is a plan view of the chain.

This invention has relation to means forcouneeting logs in rafting andbooming; and it consists in the construction and novel arrangementof theheaded plugs. the offset neek-lin ks engaging said plugs, and theintermediate connecting-link engaging the-offset portions of theneck-links, all as hereinafter set forth.

In the accompanying drawings, the letters A and B indicate the ends oftwo legs.

0 represents a metallic plug, preferably made of wrought-iron. It isformed with arounded concave neck portion, d, gradually swelling fromthe shank e to form the base of the head g. This construction isdesigned to give great strength to this part of the plug, which is oftensubject to intense strain. 7

H designates a neck-link, fitting the shank of the plug easily, andhaving an offset bend,

it, at one side of sufficient depth to receive the end of aconnecting-link, L, so that said link will never bind against the shankof the plug, but will always be free to accommodate itself to anyposition which the logs may take with reference to each other.

In using this device a plug is driven through each neck-link into a log,so that the logs are coupled securely, and yet have easy rolling playand a little endwise motion with reference to each other. As theconnecting-link does not bind between the plugs and the neck-links, itwill not wear out for a very long time, and the device can be usedtherefore an indefinite number of times.

Eyebolts and T-bolts havingthreaded shanks have been used in connectionwith chains provided with rings for connecting the booms of a raft priorto my invention, and neekrings are old in boat-detaehers. I do nottherefore claim either broadly herein.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s-

The log-coupling.consisting of the headed plugs 0, having the head 9 andconcave d, the offset neck-links H, engaging said plugs, and theintermediate connecting-link, L, engaging the oifset portions 7c of theneck-links, substantially as shown and described.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

" THOMAS IRVINE.

Witnesses GEo. Seorr, HENRY SoHEoEnEs.

